Diaphragm pump



FIG. 1 is a top perspective view of a diaphragm pump showing our new design;

FIG. 2 is a bottom perspective view;

FIG. 3 is a side view;

FIG. 4 is a side view of the diaphragm pump shown in FIG. 1 from the other side;

FIG. 5 is a back view;

FIG. 6 is a front view;

FIG. 7 is a top view; and,

FIG. 8 is a bottom view.

The broken line showing in FIGS. 1 and 4 is included for the purpose of illustrating environmental matter and forms no part of the claimed design. 

We claim the ornamental design of a diaphragm pump, as shown and described herein. 